I have Urticaria ( hives on the skin), could this be Cushing syndrome?

I have had these embarrassing hives for about 10 years now off and on almost daily for no apparent reason. My skin will be fine and then it will feel like a hot flash and I’m burning up and I have hives on my face, neck, shoulders, arms, chest, sometimes legs. They will be very hot (not itchy) but then go away in a matter of minutes to sometimes hours. I thought it had some kind of relation to food but it happens even before I eat anything at all during the day. I’ve been prescribed beta blockers and xanax… nothing helps. Could this be Cushing syndrome? Thanks

Age: 25
Medications: Alprazolam
General Information: I also gain weight primarily in my stomach and face. Got lots of cortisone steroid shots for shoulder pain years ago